"Castillo sold the undercover agent an AK-47 assault rifle and more than 800 rounds of ammunition for $14,000," court documents said. "But this time, ‘El Gallo’ (Spanish for 'rooster') delivered his weapons from a baby carriage that he wheeled to the undercover officer’s car."

The two men were arrested at the hot dog stand, according to the Mercury News, and face lengthy prison terms if convicted.